WM8983GEFL/V Wolfson Microelectronics, WM8983GEFL/V Datasheet - Page 42

• Manufacturer Part Number: WM8983GEFL/V
• Description: Audio CODECs Mbl Multimedia CODEC w/ 1W Speaker Driver
• Manufacturer: Wolfson Microelectronics

Specifications of WM8983GEFL/V

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8983
w
NOTCH FILTER WORKED EXAMPLE
The following example illustrates how to calculate the a
frequency and -3dB bandwidth.
F
f
f
NFA0 = -a
NFA1 = -a
These values are then converted to a 2’s complement notation:
NFA0[13:0] = 14’h1F95; Converting to 2’s complement NFA0 = 14’h4000 – 14’h1F95 = 14’h206B
NFA1[13:0] = 14’h1F85; Converting to 2’s complement NFA0 = 14’h1F85
b
s
w
w
a
a
c
1
0
= 100 Hz
= 48000 Hz
0
b
= 1000 Hz
=
=
=
=
−
1
1
2
2
1 (
π
π
s f
s f
−
+
c f
b f
tan
tan
+
0
1
x 2
x 2
=
=
a
(w
(w
) 0
2
2
13
12
π
π
/ b
/ b
cos(






= -8085 (rounded to nearest whole number)
= 8069 (rounded to nearest whole number)
2
2
48000
48000
1000
)
)
100
w
=
) 0
1
1






−
+
=
=
=
tan
tan
−
1 (
. 0
. 0
(
(
1308996939
0130899693
+
0
0
.
.
0130899693
0130899693
. 0
9869949627
9
rads
rads
9
9
/
/
2
2
)
cos(
)
)
=
. 0
0
.
1308996939
9869949627
0
and a
)
1
=
coefficients for a desired centre
−
. 1
969995945
PD, Rev 4.3, May 2010
Production Data
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